Extruded board with realistic appearance
In one embodiment, an extruded board includes at least one streak portion including a first colored portion at an outer surface of a core portion of the board, a second colored portion extending into the core from the first colored portion, and a third colored portion extending further into the core from the second colored portion, and at least one resin portion including a first base portion located directly between the second colored portion and the outer surface, and a second base portion located directly between the third colored portion and the outer surface, the resin portion having an opacity which allows the second colored portion to be viewed from the outer surface through the first base portion under natural light, and which does not allow the third colored portion to the viewed from the outer surface through the second base portion under natural light.
1. A method of forming an extruded board, comprising:
melting a base resin;
coloring the melted base resin with a color additive;
transporting the melted colored base resin and a plurality of at least partially un-melted streaker pellets to a breaker plate with an extruder;
melting the at least partially un-melted streaker pellets by forcing the transported melted colored base resin and plurality of at least partially un-melted streaker pellets through the breaker plate;
streaking the melted streaker pellets within the transported melted colored base resin; and
shaping the streaked transported melted colored base resin into a core of a board having a first outer surface and a second outer surface opposite to the first outer surface.
2. The method of claim 1 , further comprising:
transporting a chemical foaming agent to the breaker plate with the melted colored base resin and the plurality of at least partially un-melted streaker pellets with the extruder; and
forming a plurality of voids within the streaked transported melted colored base resin with the chemical foaming agent, at least a portion of the plurality of voids opening to the first outer surface of the board.
3. The method of claim 2 , further comprising:
removing an outer surface layer of the board thereby exposing streak portions within an outer exposed portion of the board.
4. The method of claim 3 , wherein removing the outer surface layer of the board comprises:
removing an outer surface layer of between about 0.20 inches and 0.060 inches of the board.
5. The method of claim 4 , further comprising:
embossing the outer exposed portion of the board.
6. The method of claim 5 , further comprising:
forming a clear sealer layer on the embossed outer exposed portion of the board.
7. The method of claim 1 , wherein:
melting the at least partially un-melted streaker pellets comprises forcing the at least partially un-melted streaker pellets toward a breaker plate located adjacent an end portion of an extruder screw; and
streaking the melted streaker pellets within the transported melted colored base resin comprises slowing movement of the melted streaker pellets with respect to a bulk flow using a breaker plate having a plurality of openings therethrough and located adjacent an end portion of the extruder screw.
8. The method of claim 7 , wherein streaking the melted streaker pellets further comprises:
forcing the melted streaker pellets through a plurality of concentrically positioned orifices in the breaker plate.
9. The method of claim 8 , wherein streaking the melted streaker pellets further comprises:
forcing the melted streaker pellets through a plurality of concentrically positioned circular orifices in the breaker plate.
10. The method of claim 8 , wherein all of the orifices are located peripherally about the breaker plate, the method further comprising:
rolling the melted colored base resin and the streaked melted streaker pellets with a cone shaped portion of the breaker plate.